Fixed Frame Type Hydraulic Power Press Machine, also known as a monoblock hydraulic press or straight-side press, is a heavy-duty industrial machine designed for high-force applications like forging, punching, deep drawing, stamping, and other material forming processes. The defining characteristic of this press is its rigid, single-piece frame, which provides maximum stability and resistance to deflection during operations. Here’s a detailed description:

Key Features:

1. Fixed Frame Design (Monoblock Structure):

   • The fixed frame is made from a single, robust piece of cast iron or steel, ensuring rigidity and stability. Unlike open-frame or C-type presses, this design prevents frame deformation during high-pressure operations.
   • This closed-frame structure allows for even pressure distribution and minimizes deflection, making it ideal for tasks requiring high accuracy and repeatability.
   • The machine’s heavy-duty frame is engineered to handle massive loads and reduce vibrations, resulting in smoother and more consistent operations.

2. Hydraulic System:

   • The press is powered by a hydraulic system that includes a hydraulic pump, valves, and cylinders. These components work together to generate the necessary force for pressing operations.
   • The hydraulic cylinder controls the movement of the ram (upper platen), applying uniform pressure onto the material placed on the lower platen (table).
   • Hydraulic pressure can be finely controlled for precision, making the machine suitable for a wide range of operations, from heavy forming to delicate stamping.

3. Ram/Platen:

   • The ram is the moving upper platen that applies force onto the workpiece. It is guided by the frame to move vertically in a straight path, ensuring precise alignment.
   • The platen size can vary depending on the application, and the ram stroke is typically adjustable for different operational needs, ranging from shallow pressing to deep forming.
   • The lower platen (table) is fixed and can hold dies, molds, or workpieces securely during the pressing cycle.

4. Adjustable Stroke and Pressure Control:

   • The stroke length of the ram can be customized based on the specific needs of the operation. This allows for flexibility in handling various material thicknesses and workpiece sizes.
   • The hydraulic system offers precise control over the applied pressure, making the machine suitable for both heavy-duty and precision tasks.

5. Control System:

   • Modern fixed-frame hydraulic presses often come with advanced PLC (Programmable Logic Controller) systems or digital control panels for easy operation.
   • Operators can adjust parameters such as pressure, stroke, speed, and cycle times, allowing for custom pressing sequences and automated processes.
   • Safety features like emergency stops, pressure relief valves, and overload protection are often integrated to ensure safe and reliable operation.

6. Ejectors and Die Cushions:

   • Some models include ejectors or die cushions, which assist in removing formed parts from the die or mold after pressing, improving workflow efficiency.
   • These features are especially useful in deep drawing and other processes where material needs to be stretched or shaped.

Applications:

1. Metal Stamping and Forming:

   • Widely used for stamping and forming metal sheets into various shapes, particularly in industries like automotive, aerospace, and appliances.

2. Deep Drawing:

   • Ideal for deep drawing operations, where metal sheets are stretched into deep shapes, such as automotive body parts or kitchen sinks.

3. Forging:

   • Used in hot and cold forging operations to shape metals like aluminum, steel, and copper by applying high pressure to a heated or cold metal blank.

4. Punching and Blanking:

   • The fixed-frame press is effective for punching holes or blanking (cutting out parts from sheet metal) in a precise and repeatable manner.

5. Embossing:

   • Commonly used for embossing patterns or logos onto metal surfaces for both functional and aesthetic purposes.

6. Compacting:

   • Suitable for compacting powdered materials into solid shapes, such as in the manufacturing of ceramics, pharmaceuticals, or metal parts.

7. Molding:

   • Utilized in rubber molding or plastic molding applications, such as the production of rubber seals or plastic components.

Advantages:

1. High Stability and Strength:

   • The fixed-frame design ensures minimal deflection under load, making it ideal for high-force applications that require consistent pressure and precision.

2. Precision and Accuracy:

   • The guided ram ensures precise vertical movement, resulting in high accuracy during forming, punching, or deep drawing operations.

3. Versatile Applications:

   • Suitable for a wide range of industries, including automotive, aerospace, metal fabrication, plastic molding, and more.

4. Heavy-Duty Performance:

   • Capable of handling extremely high pressures, making it suitable for industrial applications involving large or thick workpieces.

5. Reduced Vibration:

   • The robust frame design minimizes vibration during operation, leading to smoother performance and reduced wear on tools and dies.

6. Long Lifespan:

   • Built for durability, the heavy construction and precision engineering of the fixed-frame press ensure a long operational life, even in harsh working environments.

Technical Specifications:

• Capacity: Ranges from 5 tons to 500 tons, depending on the size and application.
• Ram Stroke Length: Adjustable, typically ranging from 200 mm to 400 mm or more.
• Table Size: Varies based on the model and can range from 300 mm x 300 mm to 800 mm x 700 mm.
• Speed: The ram speed can be adjusted based on material and application requirements.
• Power Source: Typically powered by an electric motor driving the hydraulic pump.
• Control System: PLC or manual controls for fine-tuned pressure, stroke, and speed adjustment.

Common Industries:

1. Automotive:

   • Used to manufacture body panels, components, and other parts that require precise forming or stamping.

2. Aerospace:

   • For producing lightweight, strong components for aircraft through deep drawing, forming, and embossing.

3. Metal Fabrication:

   • Employed in metal workshops for heavy-duty tasks such as punching, forging, or bending metal sheets.

4. Plastic and Rubber:

   • Used in molding processes to create plastic or rubber parts for various industries.

5. Heavy Machinery:

   • Utilized in the production of large, thick components that require significant force for forming and shaping.